What's the difference between Fetion and SMS?

China Mobile Fetion is an instant messaging and short message sending and receiving software for multi-terminal login of mobile phones and computers, serving mobile users in China. Short message service (SMS for short) is text or digital information sent or received directly by users through mobile phones or other telecommunication terminals. The number of characters that users can receive and send short messages at a time is 16 English or digital characters or 7 Chinese characters. Short message is a kind of telecommunication service that comes with digital mobile communication system. It is a non-real-time and non-voice data communication service to transmit text or digital short messages through the signaling channel and signaling network of mobile communication system.